In an average composition of a cell, the maximum % of total cellular mass [after water and protein] is constituted by:

1. Carbohydrates

2. Lipid

3. Nucleic acids

4. Ions

Where would you expect to find serine and alanine amino acids in a globular protein in aqueous solution?

(1) Serine would be in the interior, and alanine would be on the exterior of the globular protein.

(2) Alanine would be in the interior, and serine would be on the exterior of the globular protein.

(3) Both serine and alanine would be in the interior of the globular protein.

(4) Both serine and alanine would be on the exterior of the globular protein.  

The vitamin Niacin functions as a coenzyme in:

1. Nucleoprotein synthesis

2. Hydrogen transport

3. Fatty acid synthesis

4. RBC production

The six most common atoms in organic molecules are:

The unique properties of each amino acid are determined by its particular:

1. R group

2. Amino group

3. Kinds of peptide bonds

4. Number of bonds to other amino acids 

Based on the graph of an enzyme-catalyzed reaction, which of the following could be used to increase the reaction rate beyond point C?

1. increase the amount of substrate

2. add more water

3. increase the temperature

4. decrease enzyme concentration

Given below is the graph showing the effect of substrate concentration on enzyme activity. In the presence of a competitive inhibitor, when the concentration of the substrate is progressively increased:

1. The ${\mathrm{K}}_{\mathrm{m}}$ value is increased but the reaction will not achieve ${\mathrm{V}}_{\max }$

2. The ${\mathrm{K}}_{\mathrm{m}}$ value is increased but the reaction can ultimately achieve ${\mathrm{V}}_{\max }$

3. The ${\mathrm{K}}_{\mathrm{m}}$ value is decreased but the reaction will not achieve ${\mathrm{V}}_{\max }$

4. The ${\mathrm{K}}_{\mathrm{m}}$ value is decreased but the reaction can ultimately achieve ${\mathrm{V}}_{\max }$

Study the primary structure of a part of a hypothetical protein and choose the correct statements:

I. 1 is Serine

II. 2 is sulfur containing amino acid and can be methionine

III. 3 is aromatic amino acid and can by tyrosine

IV. 4 is an acidic amino acid

1. I, II and III only

2. I, III and IV only

3. II, III and IV only

4. I, II, III and IV

Which of the following biomolecules does have a phosphodiester bond?

(1) Fatty acids in a diglyceride

(2) Monosaccharides in a polysaccharide

(3) Amino acids in a polypeptide

(4) Nucleic acids in a nucleotide

The chitinous exoskeleton of arthopods is formed by the polymerisation of 

(1) keratin sulphate and chondroitin sulphate

(2) D-glucosamine

(3) N-acetyl glucosamine

(4) lipoglycans